ATE72223T1 - PROCESS FOR THE PREPARATION OF TRIALKOXYBENZALDEHYDE. - Google Patents

PROCESS FOR THE PREPARATION OF TRIALKOXYBENZALDEHYDE.

Info

Publication number
ATE72223T1
ATE72223T1 AT88420024T AT88420024T ATE72223T1 AT E72223 T1 ATE72223 T1 AT E72223T1 AT 88420024 T AT88420024 T AT 88420024T AT 88420024 T AT88420024 T AT 88420024T AT E72223 T1 ATE72223 T1 AT E72223T1
Authority
AT
Austria
Prior art keywords
methoxybenzaldehyde
preparation
bromo
hydroxy
trialkoxybenzaldehyde
Prior art date
Application number
AT88420024T
Other languages
German (de)
Inventor
Michel Crochemore
Original Assignee
Rhone Poulenc Chimie
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rhone Poulenc Chimie filed Critical Rhone Poulenc Chimie
Application granted granted Critical
Publication of ATE72223T1 publication Critical patent/ATE72223T1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C47/00—Compounds having —CHO groups
    • C07C47/52—Compounds having —CHO groups bound to carbon atoms of six—membered aromatic rings
    • C07C47/575—Compounds having —CHO groups bound to carbon atoms of six—membered aromatic rings containing ether groups, groups, groups, or groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
    • C07C45/64—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by introduction of functional groups containing oxygen only in singly bound form
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
    • C07C45/67—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton
    • C07C45/68—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms
    • C07C45/70—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms by reaction with functional groups containing oxygen only in singly bound form
    • C07C45/71—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms by reaction with functional groups containing oxygen only in singly bound form being hydroxy groups

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • Catalysts (AREA)

Abstract

An improved process for the preparation of 3,4,5-trialkoxybenzaldehyde and more particularly of 3,4,5-trimethoxybenzaldehyde from 5-bromo-4-hydroxy- 3-methoxybenzaldehyde. <??>More precisely, a process for the preparation of 4,5-dialkoxy- 3-methoxybenzaldehyde from 5-bromo-4-hydroxy-3-methoxybenzaldehyde, characterised in that the following are carried out successively and without isolation of the intermediate compounds: - hydrolysis of 5-bromo-4-hydroxy-3-methoxybenzaldehyde to 4,5-dihydroxy-3-methoxybenzaldehyde using an alkali metal hydroxide in water and in the presence of a copper catalyst: - etherification of the 4,5-dihydroxy-3-methoxybenzaldehyde obtained previously with the aid of a lower alkyl halide in an aqueous medium and while the pH is maintained at chosen values, optionally in the presence of a catalyst. <??>3,4,5-Trimethoxybenzaldehyde which may be prepared by this process is used especially for the preparation of pharmaceutical products.
AT88420024T 1987-01-28 1988-01-27 PROCESS FOR THE PREPARATION OF TRIALKOXYBENZALDEHYDE. ATE72223T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8701174A FR2609984B1 (en) 1987-01-28 1987-01-28 PROCESS FOR THE PREPARATION OF TRIALKOXYBENZALDEHYDE
EP88420024A EP0277894B1 (en) 1987-01-28 1988-01-27 Process for the preparation of trialkoxybenzaldehyde

Publications (1)

Publication Number Publication Date
ATE72223T1 true ATE72223T1 (en) 1992-02-15

Family

ID=9347458

Family Applications (1)

Application Number Title Priority Date Filing Date
AT88420024T ATE72223T1 (en) 1987-01-28 1988-01-27 PROCESS FOR THE PREPARATION OF TRIALKOXYBENZALDEHYDE.

Country Status (7)

Country Link
US (1) US4933498A (en)
EP (1) EP0277894B1 (en)
JP (1) JPS63201144A (en)
AT (1) ATE72223T1 (en)
BR (1) BR8800296A (en)
DE (1) DE3868081D1 (en)
FR (1) FR2609984B1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4914243A (en) * 1987-12-23 1990-04-03 American Home Products Corporation Production of 2-alkoxy or aryl(lower)alkoxy-6-methoxy-1-naphthalenecarboxaldehyde
FR2669026A1 (en) * 1990-11-09 1992-05-15 Rhone Poulenc Chimie Process for the preparation of alkoxybenzaldehydes
FR2669025A1 (en) * 1990-11-09 1992-05-15 Rhone Poulenc Chimie Process for the preparation of alkoxybenzaldehydes
FR2669024A1 (en) * 1990-11-09 1992-05-15 Rhone Poulenc Chimie Process for the preparation of alkoxybenzaldehydes
FR2663925A1 (en) * 1990-06-27 1992-01-03 Rhone Poulenc Chimie Process for the preparation of alkoxybenzaldehydes
EP0463946A1 (en) * 1990-06-27 1992-01-02 Rhone-Poulenc Chimie Process for the preparation of polyalkoxylated aromatic compounds
FR2669924B1 (en) * 1990-11-30 1993-01-29 Rhone Poulenc Chimie PROCESS FOR THE PREPARATION OF POLYALKOXYLATED AROMATIC COMPOUNDS.
FR2669925B1 (en) * 1990-11-30 1993-01-29 Rhone Poulenc Chimie PROCESS FOR THE PREPARATION OF POLYALKOXYLATED AROMATIC COMPOUNDS.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE789586A (en) * 1972-03-27 1973-04-02 Hoffmann La Roche PROCESS FOR THE PREPARATION OF 3,4,5-TRIMETHOXY-BENZALDEHYDE
JPS56150034A (en) * 1980-04-24 1981-11-20 Ube Ind Ltd Preparation of 3,4,5-trimethoxybenzaldehyde
US4465864A (en) * 1982-08-02 1984-08-14 International Telephone And Telegraph Corporation Process of hydroxylation of an aromatic carbonyl compound

Also Published As

Publication number Publication date
BR8800296A (en) 1988-09-06
FR2609984A1 (en) 1988-07-29
FR2609984B1 (en) 1989-05-05
EP0277894B1 (en) 1992-01-29
US4933498A (en) 1990-06-12
JPH0532379B2 (en) 1993-05-14
EP0277894A3 (en) 1988-08-24
DE3868081D1 (en) 1992-03-12
JPS63201144A (en) 1988-08-19
EP0277894A2 (en) 1988-08-10

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